Method and apparatus for determining a flow rate error in a vibrating flow meter
AssigneeMicro Motion, Inc.
InventorsAnthony William Pankratz, Joel Weinstein
Life of this patent
Estimating the term…
Abstract
A method for determining an error in a flow rate of a fluid flowing through a vibrating flow meter is provided. The method includes the step of receiving sensor signals from the vibrating flow meter. A first flow rate is determined using the sensor signals. A fluid density is determined. A fluid velocity is determined using the first flow rate, the fluid density, and a physical property of the flow meter. A flow parameter, V/p is calculated based on the fluid velocity and the density. A flow rate error is then determined based on the calculated flow parameter.
Claims12
A method for determining an error in a flow rate of a fluid flowing through a vibrating flow meter, comprising the steps of:
- receiving sensor signals from the vibrating flow meter;
- determining a first flow rate using the sensor signals;
- determining a fluid density, ρ;
- determining a fluid velocity, V, using the first flow rate, the fluid density, and a physical property of the vibrating flow meter;
- calculating a flow parameter, V/ρ based on the fluid velocity and the density;
- and
- determining a flow rate error based on the calculated flow parameter.
Meter electronics (20) for a vibrating flow meter (10) including a processing system (203) configured to:
- receive sensor signals (210) from the vibrating flow meter (10);
- determine a first flow rate using the sensor signals (210);
- determine a fluid density, p;
- determine a fluid velocity, V, using the first flow rate, the fluid density, and a physical property of the vibrating flow meter;
- calculate a flow parameter, V/ρ based on the fluid velocity and the density;
- and
- determine a flow rate error based on the calculated flow parameter.
Dependencies are inferred from the claim text.